Extension device for a tool



FIG. 1 is a perspective top front right view of an extension device for a tool, showing my new design;

FIG. 2 is a perspective bottom rear left view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a left elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a cross-sectional view of FIGS. 7 and 8.

The broken line segments in FIGS. 1 through 3 are intended to represent the area where the head of a tool would be located, such as a ratchet wrench, and form no part of the claimed design. 

CLAIM The ornamental design for an extension device for a tool, as shown and described. 